Feature/compress assets

This compresses all the assets and is the first half of some page load improvements on the client side. Soon it will also include CSS sprites, because this was relatively easy to do and a automated compilation through Grunt's watch command.

The one thing I am not sure about is where some of the other assets are located - presumably in the theme and thus managed by Pantheon? There also appears to be a deal of inline JS I am going to abstract.